/*
 * OnFly AirlineUI Custom Theme
 * Applies a modern, consistent look across all pages and components.
 * Requires Bootstrap 5 and Bootstrap Icons.
 */

/* Core Variables - Professional Color Palette */
:root {
    /* Primary Colors */
    --onfly-primary: #0d6efd;
    --onfly-primary-dark: #0052cc;
    --onfly-accent: #0099e5;

    /* Status Colors */
    --onfly-success: #10b981;
    --onfly-warning: #f59e0b;
    --onfly-danger: #ef4444;
    --onfly-info: #3b82f6;

    /* Neutrals */
    --onfly-gray-50: #f9fafb;
    --onfly-gray-100: #f3f4f6;
    --onfly-gray-200: #e5e7eb;
    --onfly-gray-300: #d1d5db;
    --onfly-gray-400: #9ca3af;
    --onfly-gray-500: #6b7280;
    --onfly-gray-600: #4b5563;
    --onfly-gray-700: #374151;
    --onfly-gray-800: #1f2937;
    --onfly-gray-900: #111827;

    /* Design System */
    --onfly-radius-sm: 0.25rem;
    --onfly-radius: 0.5rem;
    --onfly-radius-lg: 0.75rem;
    --onfly-shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --onfly-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --onfly-shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);

    /* Layout */
    --sidebar-width: 260px;
    --onfly-header-height: 64px;
    --onfly-content-padding: 1.5rem;
}

/* ========== BASE & TYPOGRAPHY ========== */
body {
    font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Helvetica Neue', Arial, sans-serif;
    color: var(--onfly-gray-800);
    background-color: #f5f7fa;
    line-height: 1.5;
    font-size: 0.95rem;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 600;
    color: var(--onfly-gray-900);
    margin-bottom: 1rem;
    letter-spacing: -0.01em;
}

h1 {
    font-size: 2rem;
}

h2 {
    font-size: 1.75rem;
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.25rem;
}

h5 {
    font-size: 1.1rem;
}

h6 {
    font-size: 1rem;
}

a,
.btn-link {
    color: var(--onfly-primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

a:hover,
.btn-link:hover {
    color: var(--onfly-primary-dark);
    text-decoration: underline;
}

/* ========== LAYOUT COMPONENTS ========== */
.page {
    display: flex;
    min-height: 100vh;
    background-color: #f5f7fa;
}

.main-container {
    max-width: 1600px;
    margin: 0 auto;
    padding: var(--onfly-content-padding);
}

.content {
    flex: 1;
    padding: var(--onfly-content-padding);
    background-color: transparent;
}

/* ========== SIDEBAR ========== */
.sidebar {
    background: linear-gradient(180deg, var(--onfly-primary) 0%, #3a2067 100%);
    width: var(--sidebar-width);
    padding: 0;
    box-shadow: var(--onfly-shadow);
    color: white !important;
    min-height: 100vh;
    z-index: 100;
    position: sticky;
    top: 0;
}

.sidebar .nav-link {
    color: rgba(255, 255, 255, 0.85) !important;
    padding: 0.8rem 1.5rem;
    border-radius: var(--onfly-radius);
    font-weight: 500;
    letter-spacing: 0.01em;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.25rem;
    text-shadow: 0 1px 1px rgba(0, 0, 0, 0.1);
}

.sidebar .nav-link i {
    font-size: 1.25rem;
    opacity: 0.85;
}

.sidebar .nav-link.active,
.sidebar .nav-link:hover {
    background-color: rgba(255, 255, 255, 0.15);
    color: white !important;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.15);
}

.sidebar .nav-link.active i,
.sidebar .nav-link:hover i {
    opacity: 1;
}

.sidebar .nav-section-header {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin: 1.5rem 0 0.5rem 1.5rem;
    padding-left: 0.5rem;
    border-left: 3px solid rgba(255, 255, 255, 0.4);
}

/* ========== TOP ROW NAVIGATION ========== */
.top-row {
    background-color: white;
    height: var(--onfly-header-height);
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding: 0 var(--onfly-content-padding);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 90;
}

.top-row a {
    margin-left: 1rem;
    color: var(--onfly-gray-700);
    font-weight: 500;
}

.top-row a:hover {
    color: var(--onfly-primary);
}

/* ========== BUTTON STYLING IMPROVEMENTS ========== */
.btn {
    font-weight: 600;
    border-radius: var(--onfly-radius);
    box-shadow: var(--onfly-shadow-sm);
    border: 1px solid var(--onfly-gray-200);
    background: var(--onfly-gray-100);
    color: var(--onfly-gray-800);
    padding: 0.38rem 1rem;
    font-size: 0.98rem;
    transition: background 0.18s, color 0.18s, border 0.18s, box-shadow 0.18s, filter 0.18s;
    outline: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    position: relative;
    overflow: hidden;
    letter-spacing: 0.01em;
    min-height: 2.1rem;
}

.btn:active {
    box-shadow: var(--onfly-shadow);
    filter: brightness(0.97);
}

.btn:focus {
    border-color: var(--onfly-primary);
    box-shadow: 0 0 0 3px rgba(13, 110, 253, 0.18), var(--onfly-shadow-sm);
    outline: none;
}

/* Ripple effect */
.btn::after {
    content: '';
    position: absolute;
    border-radius: 50%;
    pointer-events: none;
    width: 100px;
    height: 100px;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%) scale(0);
    background: rgba(13, 110, 253, 0.12);
    opacity: 0;
    transition: transform 0.3s, opacity 0.4s;
    z-index: 1;
}

.btn:active::after {
    transform: translate(-50%, -50%) scale(1.5);
    opacity: 1;
    transition: 0s;
}

/* Primary button */
.btn-primary {
    background: #5DADE1 !important;
    color: #fff !important;
    border: 1px solid #5DADE1;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.13);
    box-shadow: 0 2px 8px 0 rgba(13, 110, 253, 0.08);
}

.btn-primary:hover:not(:disabled),
.btn-primary:focus:not(:disabled) {
    background: var(--onfly-primary-dark) !important;
    color: #fff !important;
    border-color: var(--onfly-primary-dark) !important;
    box-shadow: 0 4px 12px 0 rgba(13, 110, 253, 0.13);
    filter: brightness(1.04);
}

/* Secondary button */
.btn-secondary {
    background: var(--onfly-gray-600) !important;
    color: #fff !important;
    border: 1px solid var(--onfly-gray-700) !important;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.10);
}

.btn-secondary:hover:not(:disabled),
.btn-secondary:focus:not(:disabled) {
    background: var(--onfly-gray-700) !important;
    color: #fff !important;
    border-color: var(--onfly-gray-800) !important;
    box-shadow: 0 4px 12px 0 rgba(55, 65, 81, 0.13);
    filter: brightness(1.04);
}

/* Success button */
.btn-success {
    background: var(--onfly-success) !important;
    color: #fff !important;
    border: 1px solid #0ca975 !important;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.10);
}

.btn-success:hover:not(:disabled),
.btn-success:focus:not(:disabled) {
    background: #0ca975 !important;
    color: #fff !important;
    border-color: #0ca975 !important;
    box-shadow: 0 4px 12px 0 rgba(16, 185, 129, 0.13);
    filter: brightness(1.04);
}

/* Danger button */
.btn-danger {
    background: var(--onfly-danger) !important;
    color: #fff !important;
    border: 1px solid #dc2626 !important;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.10);
}

.btn-danger:hover:not(:disabled),
.btn-danger:focus:not(:disabled) {
    background: #dc2626 !important;
    color: #fff !important;
    border-color: #b91c1c !important;
    box-shadow: 0 4px 12px 0 rgba(239, 68, 68, 0.13);
    filter: brightness(1.04);
}

/* Disabled button improvements */
.btn:disabled,
.btn.disabled,
button:disabled {
    background: var(--onfly-gray-100) !important;
    color: var(--onfly-gray-400) !important;
    border: 1px solid var(--onfly-gray-200) !important;
    opacity: 1 !important;
    box-shadow: none !important;
    cursor: not-allowed !important;
    text-shadow: none !important;
    filter: grayscale(0.15) brightness(1.08);
    outline: none !important;
}

/* Icon-only and ghost buttons */
.btn.btn-icon,
.btn-icon,
.btn-ghost {
    background: transparent !important;
    color: var(--onfly-primary) !important;
    border: none !important;
    box-shadow: none !important;
    padding: 0.35rem 0.35rem;
    min-width: 2rem;
    min-height: 2rem;
    border-radius: 50%;
    transition: background 0.18s, color 0.18s, box-shadow 0.18s;
}

.btn.btn-icon:hover:not(:disabled),
.btn-icon:hover:not(:disabled),
.btn-ghost:hover:not(:disabled) {
    background: rgba(13, 110, 253, 0.08) !important;
    color: var(--onfly-primary-dark) !important;
    box-shadow: 0 2px 8px 0 rgba(13, 110, 253, 0.08);
}

.btn.btn-icon:focus,
.btn-icon:focus,
.btn-ghost:focus {
    background: rgba(13, 110, 253, 0.13) !important;
    color: var(--onfly-primary-dark) !important;
    outline: none;
    box-shadow: 0 0 0 2px var(--onfly-primary), var(--onfly-shadow-sm);
}

.btn.btn-icon:disabled,
.btn-icon:disabled,
.btn-ghost:disabled {
    color: var(--onfly-gray-300) !important;
    background: transparent !important;
    border: none !important;
}

/* Outline buttons */
.btn-outline-primary,
.btn-outline-primary:disabled {
    color: var(--onfly-primary) !important;
    background: #fff !important;
    border: 1.5px solid var(--onfly-primary) !important;
    box-shadow: none !important;
}

.btn-outline-primary:hover:not(:disabled),
.btn-outline-primary:focus:not(:disabled) {
    background: var(--onfly-primary) !important;
    color: #fff !important;
    border-color: var(--onfly-primary-dark) !important;
    box-shadow: 0 4px 12px 0 rgba(13, 110, 253, 0.13);
}

/* Modal footer button alignment */
.modal-footer .btn {
    min-width: 120px;
    margin: 0 0.25rem;
}

/* Button group spacing */
.btn+.btn {
    margin-left: 0.5rem;
}

/* Responsive button font size */
@media (max-width: 576px) {
    .btn {
        font-size: 0.92rem;
        padding: 0.32rem 0.7rem;
    }

    .card-header,
    .modal-header,
    .card-footer,
    .modal-footer {
        padding: 0.55rem 0.6rem;
        font-size: 0.97rem;
    }

    .table th,
    .table td {
        padding: 0.32rem 0.5rem;
        font-size: 0.92rem;
    }
}

/* ========== CARD, MODAL, TABLE, BADGE, ALERT, DROPDOWN POLISH ========== */
.card,
.modal-content {
    background: #fff;
    border-radius: var(--onfly-radius-lg);
    box-shadow: 0 4px 16px 0 rgba(13, 110, 253, 0.08), 0 1.5px 4px 0 rgba(0, 0, 0, 0.04);
    border: none;
    margin-bottom: 1.2rem;
    overflow: hidden;
    transition: box-shadow 0.18s, transform 0.18s;
}

.card:hover,
.modal-content:hover {
    box-shadow: 0 8px 32px 0 rgba(13, 110, 253, 0.13), 0 2px 8px 0 rgba(0, 0, 0, 0.06);
    transform: translateY(-2px) scale(1.01);
}

.card-header,
.modal-header {
    background: #5DADE2;
    color: #fff !important;
    padding: 0.7rem 1.1rem;
    border-bottom: none;
    border-radius: calc(var(--onfly-radius-lg) - 1px) calc(var(--onfly-radius-lg) - 1px) 0 0;
    font-weight: 700;
    font-size: 1.13rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    letter-spacing: 0.01em;
    box-shadow: 0 1.5px 6px 0 rgba(13, 110, 253, 0.10);
    gap: 0.7rem;
}

.card-header i,
.modal-header i {
    font-size: 1.5rem;
    margin-right: 0.7rem;
    opacity: 0.93;
    filter: drop-shadow(0 1.5px 3px rgba(0, 0, 0, 0.18));
    color: #fff;
    background: linear-gradient(135deg, #fff2 0%, #fff0 100%);
    border-radius: 0.4em;
    padding: 0.15em 0.22em;
    transition: background 0.18s, color 0.18s;
}

.card-header i[class^="bi-"],
.modal-header i[class^="bi-"] {
    /* Bootstrap Icons: add subtle shadow and highlight */
    text-shadow: 0 2px 6px rgba(13, 110, 253, 0.18), 0 1px 2px rgba(0, 0, 0, 0.10);
}

/* Table polish */
.table {
    width: 100%;
    margin-bottom: 1.5rem;
    color: var(--onfly-gray-800);
    border-collapse: separate;
    border-spacing: 0;
    border-radius: var(--onfly-radius);
    overflow: hidden;
    background-color: #fff;
    box-shadow: var(--onfly-shadow-sm);
}

.table th,
.table td {
    padding: 0.5rem 0.75rem;
    font-size: 0.95rem;
}

.table th {
    background-color: var(--onfly-gray-100);
    color: var(--onfly-gray-700);
    font-weight: 600;
    border-color: var(--onfly-gray-200);
    text-transform: none;
    white-space: nowrap;
    border-top: none;
}

.table td {
    vertical-align: middle;
    border-color: var(--onfly-gray-200);
}

.table tbody tr:hover {
    background-color: rgba(13, 110, 253, 0.04);
}

.table-striped tbody tr:nth-of-type(odd) {
    background-color: var(--onfly-gray-50);
}

/* Badge polish */
.badge {
    font-weight: 500;
    padding: 0.25em 0.5em;
    border-radius: 50rem;
    font-size: 0.88em;
    letter-spacing: 0.01em;
    box-shadow: 0 1px 2px 0 rgba(0, 0, 0, 0.04);
}

.badge-primary {
    background-color: var(--onfly-primary);
    color: #fff;
}

.badge-success {
    background-color: var(--onfly-success);
    color: #fff;
}

.badge-warning {
    background-color: var(--onfly-warning);
    color: #7c2d12;
}

.badge-danger {
    background-color: var(--onfly-danger);
    color: #fff;
}

.badge-info {
    background-color: var(--onfly-info);
    color: #fff;
}

/* Alert polish */
.alert {
    border: none;
    border-radius: var(--onfly-radius);
    padding: 0.65rem 1rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--onfly-shadow-sm);
    font-size: 0.97rem;
    letter-spacing: 0.01em;
}

.alert-info {
    background-color: #e6f7ff;
    color: #0c5460;
}

.alert-success {
    background-color: #d1fae5;
    color: #0f766e;
}

.alert-warning {
    background-color: #fef3c7;
    color: #92400e;
}

.alert-danger {
    background-color: #fee2e2;
    color: #b91c1c;
}

/* Dropdown polish */
.dropdown-menu {
    background-color: #fff;
    border: none;
    border-radius: var(--onfly-radius-sm);
    box-shadow: var(--onfly-shadow);
    padding: 0.5rem 0;
}

.dropdown-item {
    color: var(--onfly-gray-800);
    padding: 0.35rem 0.75rem;
    font-weight: 500;
    border-radius: var(--onfly-radius-sm);
    transition: background 0.18s, color 0.18s;
    font-size: 0.97em;
}

.dropdown-item:hover,
.dropdown-item:focus {
    color: var(--onfly-primary);
    background-color: var(--onfly-gray-100);
}

.dropdown-item.active {
    color: #fff;
    background-color: var(--onfly-primary);
}

/* List group polish */
.list-group-item {
    color: var(--onfly-gray-800);
    background: #fff;
    border: 1px solid var(--onfly-gray-200);
    border-radius: var(--onfly-radius-sm);
    margin-bottom: 0.25rem;
    transition: background 0.18s, color 0.18s;
}

.list-group-item-action:hover,
.list-group-item-action:focus {
    color: var(--onfly-primary);
    background-color: var(--onfly-gray-100);
}

/* Nav tabs polish */
.nav-tabs {
    border-bottom: 1.5px solid var(--onfly-gray-300);
    margin-bottom: 1.5rem;
}

.nav-tabs .nav-link {
    color: var(--onfly-gray-700);
    font-weight: 500;
    padding: 0.5rem 0.9rem;
    border-radius: var(--onfly-radius) var(--onfly-radius) 0 0;
    border: 1px solid transparent;
    margin-right: 0.5rem;
    transition: all 0.2s ease;
    font-size: 0.97em;
}

.nav-tabs .nav-link:hover {
    color: var(--onfly-primary);
    border-color: var(--onfly-gray-200) var(--onfly-gray-200) var(--onfly-gray-300);
}

.nav-tabs .nav-link.active {
    color: #fff !important;
    background-color: var(--onfly-primary) !important;
    border-color: var(--onfly-primary);
    font-weight: 600;
}

/* Modal polish */
.modal-content {
    border-radius: var(--onfly-radius);
    border: none;
    box-shadow: var(--onfly-shadow-lg);
    color: var(--onfly-gray-800);
}

.modal-header {
    background: linear-gradient(90deg, var(--onfly-primary) 0%, var(--onfly-primary-dark) 100%;
    color: #fff !important;
    border-bottom: none;
    padding: 0.75rem 1rem;
    border-radius: calc(var(--onfly-radius) - 1px) calc(var(--onfly-radius) - 1px) 0 0;
}

.modal-title {
    font-weight: 600;
    font-size: 1.25rem;
    color: #fff !important;
}

.modal-header .btn-close {
    color: #fff;
    text-shadow: none;
    opacity: 0.8;
}

.modal-body {
    padding: 1.5rem;
    color: var(--onfly-gray-800);
}

.modal-footer {
    border-top: 1px solid var(--onfly-gray-200);
    padding: 0.75rem 1rem;
    background-color: var(--onfly-gray-50);
}

/* Accessibility: focus ring for all major interactive elements */
.btn:focus-visible,
.form-control:focus-visible,
.form-select:focus-visible,
.dropdown-item:focus-visible,
.list-group-item:focus-visible,
.nav-link:focus-visible {
    outline: 2px solid var(--onfly-primary-dark);
    outline-offset: 2px;
    box-shadow: 0 0 0 2px var(--onfly-primary), var(--onfly-shadow-sm);
}

/* --- Fix: Button contrast and icon alignment on colored backgrounds --- */
.card-header .btn,
.modal-header .btn {
    background: #fff !important;
    color: var(--onfly-primary-dark) !important;
    border: none !important;
    box-shadow: 0 2px 8px 0 rgba(13, 110, 253, 0.10);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5em;
    transition: background 0.18s, color 0.18s, box-shadow 0.18s;
}

.card-header .btn:hover,
.modal-header .btn:hover,
.card-header .btn:focus,
.modal-header .btn:focus {
    background: var(--onfly-primary) !important;
    color: #fff !important;
    box-shadow: 0 4px 16px 0 rgba(13, 110, 253, 0.18);
}

.card-header .btn i,
.modal-header .btn i {
    color: inherit !important;
    font-size: 1.25em;
    margin-right: 0.3em;
    vertical-align: middle;
    filter: none;
    background: none;
    border-radius: 0;
    padding: 0;
    opacity: 0.95;
    transition: color 0.18s;
}

.card-header .btn:disabled,
.modal-header .btn:disabled {
    background: #f3f4f6 !important;
    color: var(--onfly-gray-400) !important;
    box-shadow: none !important;
    cursor: not-allowed !important;
}

/* --- End fix --- */
/* ========== END UI POLISH ========== */

/* --- Enhanced Airport Dropdown Styles for Add/Edit Flight --- */
.input-group .dropdown.w-100 {
    position: relative;
}

.input-group .dropdown-menu {
    box-shadow: 0 4px 16px 0 rgba(13, 110, 253, 0.10), 0 1.5px 4px 0 rgba(0, 0, 0, 0.04);
    border-radius: var(--onfly-radius-lg);
    border: 1px solid var(--onfly-gray-200);
    margin-top: 2px;
    padding: 0.25rem 0;
    z-index: 20;
    min-width: 100%;
    font-size: 0.97em;
    background: #fff;
    max-height: 260px;
    overflow-y: auto;
    transition: box-shadow 0.18s;
}

.input-group .dropdown-menu .dropdown-item {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.1em;
    padding: 0.5rem 1rem;
    border-radius: var(--onfly-radius);
    font-size: 1em;
    font-weight: 500;
    color: var(--onfly-gray-800);
    background: none;
    border: none;
    transition: background 0.18s, color 0.18s;
    cursor: pointer;
    text-align: left;
}

.input-group .dropdown-menu .dropdown-item strong {
    color: var(--onfly-primary-dark);
    font-weight: 700;
    font-size: 1.08em;
}

.input-group .dropdown-menu .dropdown-item small {
    color: var(--onfly-gray-500);
    font-size: 0.93em;
    margin-top: 0.1em;
}

.input-group .dropdown-menu .dropdown-item:hover,
.input-group .dropdown-menu .dropdown-item:focus {
    background: var(--onfly-primary);
    color: #fff;
}

.input-group .dropdown-menu .dropdown-item:hover strong,
.input-group .dropdown-menu .dropdown-item:focus strong {
    color: #fff;
}

.input-group .dropdown-menu .dropdown-item:hover small,
.input-group .dropdown-menu .dropdown-item:focus small {
    color: #e0e7ef;
}

.input-group .dropdown-menu .dropdown-item.disabled {
    color: var(--onfly-gray-400);
    background: none;
    cursor: not-allowed;
}

.input-group .dropdown-menu::-webkit-scrollbar {
    width: 7px;
    background: var(--onfly-gray-100);
    border-radius: 8px;
}

.input-group .dropdown-menu::-webkit-scrollbar-thumb {
    background: var(--onfly-gray-300);
    border-radius: 8px;
}

.input-group .form-control:focus {
    border-color: var(--onfly-primary);
    box-shadow: 0 0 0 2px var(--onfly-primary), var(--onfly-shadow-sm);
}

.input-group .input-group-text {
    background: var(--onfly-gray-50);
    color: var(--onfly-primary-dark);
    border: 1px solid var(--onfly-gray-200);
    font-weight: 600;
    font-size: 1.1em;
}

/* --- End Enhanced Airport Dropdown Styles --- */